GA Quiz 2

Peripheral nervous system

What are ganglia?

masses of neuronal cell bodies outside the CNS

Anterior Nerve Root carries?

Efferent fibers, connecting to lateral and anterior horns of gray matter

Posterior Nerve Roots carries?

Afferent fibers, connecting to posterior horn of gray matter

Spinal Nerve comes from what combining? What does it separate into?

nerve roots combining; separate into ramus

What type of fibers do nerve rami have?

both

Posterior Rami of Spinal Nerve go toward what?

fibers toward synovial joints of vertebrae

fibers toward deep back muscles

Anterior Rami of Spinal Nerve go toward what?

fibers go towards skin and muscle of lateral and anterior torso

fibers towards upper and lower limbs

Somatic Fiber Types

GSA - sensory from body wall

GSE - motor stimuli towards skeletal muscles

Visceral Fiber Types

GVA - sensory from smooth muscle

GVE - stimuli toward smooth muscle

Special Fiber Types

SSA - vision and hearing

SVA - taste and smell

SVE - stimuli toward skeletal muscle derived from pharyngeal arches

Which of the following types of fibers have preganglion/postganglionic fibers?

GVE

Spinal nerve C1:

does not supply skin

Somatic plexus arises from what?

anterior rami that merge and form

Multisegmental peripheral nerves arises from?

multiple somatic plexus nerve fibers

What dermatome level is defined by C4?

top of shoulder

What dermatome level is defined by T10?

level of umbilicus

Sympathetic Nervous System (ANS) has what origin?

Thoracolumbar origin

Sympathetic Nervous System has what type of ganglia?

paravertebral/prevertebral

Cell bodies of sympathetic preganglionic neurons are found where?

found in intermediolateral cell columns (lateral horn T1-L2/3)

Cell bodies of sympathetic postganglionic neurons

found in paravertebral and prevertebral ganglia

Paravertebral ganglia

Next to vertebrae

Prevertebral ganglia

in plexus that surround aorta

White Rami Communicantes

Contain myelinated preganglionic sympathetic fibers at T1-L2

Cell bodies of parasympathetic postganglionic neurons

intramural

Cell bodies of parasympathetic preganglionic neurons

brainstem and s2-s4 spinal cord

Potential courses taking by sympathetic fibers

ascend, descend, synapse immediately, pass and dont synapse

C4 dermatome level

top of shoulder

T10 dermatome level

umbilicus